:root {
    --background: #0d0d0d;
    --deep-wood: #1a140e;
    --text: #f5f1e6;
    --muted: rgba(245, 241, 230, 0.6);
    --gold: rgba(215, 188, 117, 0.8);
    --gold-soft: rgba(215, 188, 117, 0.4);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Inter", "Noto Sans JP", "Shippori Mincho", sans-serif;
    background: var(--background);
    color: var(--text);
    letter-spacing: 0.04em;
    line-height: 1.9;
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

.noise {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: url("https://www.transparenttextures.com/patterns/asfalt-light.png");
    opacity: 0.07;
    z-index: 0;
}

.page-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px clamp(20px, 8vw, 80px);
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(6px);
}

.page-brand {
    font-size: 14px;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--gold);
    text-decoration: none;
}

.page-nav {
    display: flex;
    gap: 18px;
    font-size: 12px;
}

.page-nav a {
    text-decoration: none;
    color: var(--muted);
    letter-spacing: 0.28em;
    text-transform: uppercase;
}

.page-nav a:hover {
    color: var(--gold);
}

main {
    position: relative;
    z-index: 1;
}

section {
    padding: clamp(80px, 12vw, 140px) clamp(24px, 8vw, 160px);
}

.book-hero {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.book-header {
    background: #0b0b0b;
    padding: clamp(80px, 12vw, 150px) clamp(24px, 8vw, 160px) clamp(30px, 6vw, 70px);
    text-align: center;
}

.book-header h1 {
    margin: 0.4rem 0 0.7rem;
    font-size: clamp(28px, 5vw, 40px);
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.book-label,
.book-year {
    font-size: 0.85rem;
    opacity: 0.7;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.book-hero-cover-link {
    display: inline-block;
    transition: transform 0.6s ease;
}

.book-hero-cover-link:hover {
    transform: translateY(-8px);
}

.book-hero-cover {
    width: min(440px, 90%);
    border-radius: 32px;
    box-shadow: 0 40px 90px rgba(0, 0, 0, 0.65);
}

.book-hero-text h1 {
    margin: 0;
    font-size: clamp(32px, 6vw, 48px);
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.book-year-tag {
    font-size: 0.8rem;
    letter-spacing: 0.45em;
    text-transform: uppercase;
    color: var(--gold);
    margin: 10px 0;
}

.book-subline {
    font-size: 0.85rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    opacity: 0.7;
    margin: 0;
}

.book-copy {
    margin: 6px 0 0;
    font-size: 0.95rem;
    opacity: 0.8;
}

.book-gallery {
    background: var(--deep-wood);
    text-align: center;
}

.book-viewer {
    background: radial-gradient(circle at top, #26211a 0%, #050505 60%);
    padding: 3rem clamp(24px, 8vw, 140px) 3.5rem;
    text-align: center;
    --book-page-height: min(70vh, 760px);
    --book-page-width: calc(var(--book-page-height) * (800 / 1100));
}

.book-shell {
    position: relative;
    width: min(calc(var(--book-page-width) * 2 + 120px), 92vw);
    margin: 0 auto;
    padding: clamp(24px, 4vw, 42px) clamp(28px, 5vw, 50px);
    border-radius: 28px;
    background: linear-gradient(145deg, #101010, #070707);
    box-shadow:
        0 40px 80px rgba(0, 0, 0, 0.95),
        0 0 0 1px rgba(255, 255, 255, 0.03);
    perspective: 1800px;
}

.book-shell::after {
    content: "";
    display: block;
    clear: both;
}

.book-spine {
    position: absolute;
    inset: 40px 50%;
    width: 6px;
    transform: translateX(-50%);
    background: linear-gradient(to bottom, #2e2417, #15100b);
    border-radius: 999px;
}

.book-page {
    position: relative;
    width: var(--book-page-width);
    height: var(--book-page-height);
    overflow: hidden;
    background: #151313;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.7);
}

.book-page::after {
    content: "";
    position: absolute;
    inset: 14px;
    border-radius: inherit;
    border: 1px solid rgba(255, 255, 255, 0.05);
    pointer-events: none;
    z-index: 2;
}

.book-page-left::after {
    content: none;
}

.book-page img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: relative;
    z-index: 1;
}

.book-page-left {
    float: left;
    border-radius: 18px 0 0 18px;
}

.book-page-right {
    float: right;
    border-radius: 0 18px 18px 0;
    transform-origin: left center;
    transform-style: preserve-3d;
    backface-visibility: hidden;
    transition: transform 0.65s cubic-bezier(0.45, 0.05, 0.2, 1), box-shadow 0.6s ease;
    position: relative;
    background:
        radial-gradient(circle at 10% 0%, rgba(255, 255, 255, 0.12) 0, transparent 55%),
        radial-gradient(circle at 90% 100%, rgba(0, 0, 0, 0.35) 0, transparent 60%),
        #14110f;
}

.book-page-right.turning-forward {
    transform: rotateY(-110deg);
    box-shadow: -12px 18px 40px rgba(0, 0, 0, 0.8);
}

.book-page-right.turning-back {
    transform: rotateY(110deg);
    box-shadow: 12px 18px 40px rgba(0, 0, 0, 0.8);
}

.book-page-right.is-empty img {
    opacity: 0;
}

.book-page-right::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.65) 45%, rgba(255, 255, 255, 0.3));
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.45s ease;
    z-index: 3;
}

.book-page-right::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(0, 0, 0, 0.4), transparent 40%);
    opacity: 0.35;
    pointer-events: none;
    z-index: 1;
    mix-blend-mode: multiply;
}

.book-page-right.turning-forward::before,
.book-page-right.turning-back::before {
    opacity: 0.35;
}

.book-page-right.turning-forward {
    box-shadow: -12px 18px 40px rgba(0, 0, 0, 0.8), inset 30px 0 50px rgba(0, 0, 0, 0.35);
}

.book-page-right.turning-back {
    box-shadow: 12px 18px 40px rgba(0, 0, 0, 0.8), inset -30px 0 45px rgba(0, 0, 0, 0.25);
}

.book-page-right.turning-forward::after {
    opacity: 0.6;
}

.book-page-right.turning-back::after {
    opacity: 0.15;
}

.book-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(215, 188, 117, 0.55);
    color: #f5f1e6;
    cursor: pointer;
    font-size: 22px;
    line-height: 1;
}

.book-nav.prev {
    left: -60px;
}

.book-nav.next {
    right: -60px;
}

.book-nav:hover {
    background: rgba(0, 0, 0, 0.9);
}

.book-nav:disabled {
    opacity: 0.25;
    cursor: default;
    pointer-events: none;
}

.book-page-indicator {
    clear: both;
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(245, 241, 230, 0.7);
}

.book-thumbs {
    margin: 1.8rem auto 0;
    padding: 0 clamp(24px, 6vw, 120px) 0.6rem;
    display: flex;
    gap: 0.4rem;
    justify-content: center;
    overflow-x: auto;
}

.book-thumbs::-webkit-scrollbar {
    display: none;
}

.book-thumb {
    border: none;
    padding: 0;
    background: none;
    opacity: 0.45;
    transition: opacity 0.2s ease, transform 0.2s ease;
    cursor: pointer;
}

.book-thumb img {
    width: 72px;
    height: 50px;
    object-fit: cover;
    border-radius: 6px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.45);
    display: block;
}

.book-thumb.is-active {
    opacity: 1;
    transform: translateY(-2px);
}

.book-gallery-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

.book-gallery .gallery-lead {
    margin: 0 0 32px;
    font-size: 0.9rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gold);
}

.book-photo {
    margin: 0 auto 70px;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.book-photo.visible {
    opacity: 1;
    transform: translateY(0);
}

.book-photo img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 14px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.viewer-pages {
    display: none;
}

.mobile-only {
    display: none;
}

.mobile-gallery {
    margin: clamp(40px, 6vw, 80px) auto 0;
    max-width: 860px;
}

.book-mobile-grid {
    display: grid;
    gap: 16px;
}

.book-mobile-grid img {
    width: 100%;
    border-radius: 18px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.55);
}

@media (max-width: 900px) {
    .desktop-only {
        display: none;
    }

    .mobile-only {
        display: block;
    }
}

@media (max-width: 720px) {
    .book-footer-inner {
        flex-direction: column;
    }

    .footer-book-grid {
        grid-template-columns: 1fr;
    }
}

.page-footer {
    text-align: center;
    padding: 40px;
    font-size: 12px;
    letter-spacing: 0.3em;
    color: var(--muted);
}

.special-hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.special-card {
    border: 1px solid var(--gold-soft);
    border-radius: 26px;
    padding: 80px 60px;
    max-width: 640px;
    background: radial-gradient(circle at 0% 0%, rgba(215, 188, 117, 0.12), rgba(0, 0, 0, 0.4));
}

.special-card h1 {
    margin: 0;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    font-size: 1.6rem;
}

.special-card p {
    margin: 16px 0 32px;
    opacity: 0.8;
}

.secret-gallery {
    display: none;
    background: #050505;
}

.secret-gallery.open {
    display: block;
}

.secret-gallery .gallery-lead {
    text-align: center;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--muted);
}

.apply-hero {
    text-align: center;
}

.apply-form {
    max-width: 600px;
    margin: 0 auto;
    display: grid;
    gap: 20px;
}

.apply-form label {
    display: block;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 6px;
    color: var(--gold);
}

.apply-form input,
.apply-form textarea {
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text);
    letter-spacing: 0.08em;
}

.apply-form textarea {
    min-height: 150px;
}

.apply-form button {
    justify-self: center;
    padding: 12px 36px;
    border: 1px solid var(--gold);
    background: transparent;
    color: var(--text);
    letter-spacing: 0.25em;
    text-transform: uppercase;
    cursor: pointer;
}

.apply-note {
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.7;
    margin-top: 40px;
}

.partnership-hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
    align-items: center;
}

.partnership-list {
    list-style: none;
    padding: 0;
    margin: 24px 0;
}

.partnership-list li {
    margin-bottom: 12px;
    opacity: 0.8;
}

.partnership-hero a {
    color: var(--gold);
    text-decoration: none;
}

.partnership-hero a:hover {
    color: var(--text);
}

.partnership-cta {
    text-align: center;
    padding: clamp(40px, 8vw, 100px) clamp(24px, 8vw, 160px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.partnership-cta p {
    margin: 0 0 1rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: rgba(245, 241, 230, 0.7);
}

.partnership-cta .cta-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--gold);
    padding: 12px 36px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
    text-decoration: none;
    transition: background 0.3s ease, color 0.3s ease;
}

.partnership-cta .cta-link:hover {
    background: var(--gold);
    color: #050505;
}

.partnership-note {
    margin-top: 1.6rem;
    font-size: 0.85rem;
    opacity: 0.7;
    letter-spacing: 0.1em;
    text-transform: none;
}

.online-library-hero {
    text-align: center;
}

.online-library-track {
    margin-top: 40px;
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding-bottom: 12px;
}

.online-library-track::-webkit-scrollbar {
    display: none;
}

.library-card {
    min-width: 260px;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.45);
}

.library-card img {
    width: 100%;
    height: 360px;
    object-fit: cover;
}

.library-card p {
    margin: 0;
    padding: 16px;
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    background: rgba(0, 0, 0, 0.4);
}

@media (max-width: 720px) {
    .page-header {
        flex-direction: column;
        gap: 16px;
    }

    .page-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    section {
        padding: 80px 24px;
    }

    .book-hero {
        grid-template-columns: 1fr;
    }

    .special-card {
        padding: 60px 32px;
    }

    .book-links {
        grid-template-columns: 1fr;
    }
}
 .label {
    font-size: 12px;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--muted);
}
.desktop-only {
    display: block;
}